Recently, SEOmoz released a fantastic biennial search engine rankings report. Every two years, SEOmoz interviews the top 100 minds in the SEO industry. This time, they have gathered data from the top 72 SEO professionals to give a clear idea of how the search engines rank documents.

This aggregate data gives any SEO professional the key factors that Google uses when it comes to ranking sites on the SERPs. It is a thoroughly interesting read and will assist all SEO professionals be it a beginner or an advanced level practitioner.